Improvement in rests foe sharpening saws



@with tatre atat @frs JOSEPH F. TUDER, 0F PHILADELPHIA, PENNSYLVANIA.Letters P aent No. 62,705, dated March 5, 1867.

IMPROVEMENT IN RESTS POR SHARPENING SAWS.

"dlgs rlgcbnle afina n in tigen ittets ttnit imi mating gaat at itssulla.

TO ALL WHOM-II MAY CONCERN:

Be it known that I, JOSEPH F. TUDER, of the city an'dcounty ofPhiladelphia, and State of' Pennsylvania, have invented a newand usefulImprovement in Rests for Sharpening Saws; and I do hereby declare thatthe following is a full and exact description thereof, reference beinghad to the accompanyingdrawings and to the letters of reference marked.hereon. l

The nature of my invention consists, in the i'irst place, of aYreversible saw restprovided with a swiveljoint near its face for thepurpose of adjusting the saw so 'as to beaccurately sharpened withbevels to the edges ot' the teeth contrariwise; secondly, ineombiningthe rest with arack by means of a permanent catch projectingfrom the underside of the rest-plate in suoli a` manner as to eii'ectsharpening the teeth at each side of the saw with corresponding angles,the rest also being readily adjusted to a horizontal position forsharpening the teeth with square edges when required. The rest ispeculiarlyV adapted to my machine for sharpening saws, patented July 25,1865, but may be used advantageously in connection with other machinesfor the same purpose. The construction and operation of the rest will heunderstood by the followingdeseription. In the accompanying drawingslFigure l is a perspective view ofjthe improved rest.

`Figure 2 is a side elevation of do.

Figure 3 is a plan ofv thearrangement et' the saw with the rest, and anemery-wheel for sharpening the teeth of the llatte-1'.

Like letters in all the igures indicate the saine parts.

A is a reversible rest-platefor holding either a circular or straightsaw to be sharpened. It has an open joint, a, which connects it with thetop of the standard B, whose foot-piece,l 6, hasn longitudinal slot,c,`fo r the purpose of coniining it one. rest-plateattached to a bench,with which an emery-wheel is connected foisharpr' eni'ng the teeth ofthe saws. The plate A has a permanent arm, projecting from its underside and terminating with a catch, e, for connecting it with thepermanent rack,L on the face of the standard B, for the adjustment'ofthe plate in a horizontal position for sharpening the teeth with squareedges, or on angles, right and left, for making them angn'larorbevelled, when required. In' order to the expeditious adjustment of therest, so astio sharpen the teeth at each side of the saw preciselyalike, the notches g of the rack are numbered, right. land left, .i'rolnlthe vertical notchl o.' lhe catch is placed in the notch o for bringingthe plate A horizontally, for giving square edges to the teeth, and toone side, as seen in figs. 1 and 2, for giving bevelied edges. When soset, every other notch of the saw C, as seen, in iig. 3, is brought insuccession tothe en iery-wheel D, for sharpening the teeth at one sideof the saw; and then the rest is reversed for sharpening on the otherside by placing the catch e in the corresponding notch at the other endot' the rack. In the arm 0l there is a slot, z, concentric with thejoint a, through which a screw, E,'passes, which is confined in thestandard B, there being a nut, z', for 'confining the arm to thestandard, to give stability to therest-plate. 'I Invg. 3 the tlat partof the emery-wheel Iis' represented as bearing against the front edge ofa tooth, and the langular edgel removed from the root of the next tooth.As the einery-wheel is made to revolvevwith great rapidity., the edge isinstantly sharpened, and the saw is slightly turned around so as tobring the back edge oflthe next tooth into connection with the beveledge ofjthe wheel., Both edges may be sharpened, however, atoneoperation, vby having the bevel of' the wheelto correspond to theserrations which form the teeth of thesaws. In reversing the rest-.plateA, after slacking the nut z', the plate is slightly raised, so as tobring the catch e out of connec- .with the rack f, the open joint aaffording facility thereto. Instead of having an open joint there maybean elongated hole for the bearing ofthe joint-pin, which will answer thesame purpose. i l

What I claim as my invention, and desire to secure by Letters Patent, isV 1. Combining the rest-plateA with the standard B, by means of theioint a,'at or near the plate, substantially as above described, and forthe purpose specified. p A

2. The combination of the. rack f, on the standard B, with'therest-plate A, substantially as and for the purpose set forth. i

In testimony that the above is my invention, I have hereunto set my handand axed my seal,'this 23d day of January, 1367. l

JOS. F. TUDER. [L 3.]

Witnesses:

' Srnrnun Us'rIcK,

JOHN WHITE.

